The act getting busted by the ATF for buying illegal machine guns and silencers either by
(1) Doing it yourself
(2) Hiring a bodyguard to do it for you - all because you are a convicted felon who cannot own guns.
Puff Nappy's eyes got REAL BIG when he was suddenly "TI'ed" as he took possession of those illegal machine guns he purchased to take back to da hood.
by You Got Busted!! ha ha October 15, 2007
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1)Can stand for Teen Institute, a group dedicated to helping young adults avoid substance abuse. Is somewhat similar to SADD, but sometimes people are slightly less likely to join it just cause their friends did. In some schools, TI and SADD are combined due to their similar goals.
2)Texas Instruments, manufacturer of many fine calculators, such as the TI-83 (a godsend for algebra students), TI-84, etc.
1) "They went to the TI meeting."
2) "I have a TI-83 calculator. w00t!"
by killerfiller December 05, 2005
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That is Shit
when someone tells you that they just won a prize

TIS
by nitpicking61 January 11, 2012
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A rapper who likes to whine alot
If I wanted to hear a black person whine I'll turn on Cops or Judge Judy.

TI looks and sounds like he never broke puberty.
by Lotuseater July 27, 2006
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A word that is rarely used outside of the Drama Club circles in high schools.
Sam: My, 'tis a beautiful day.
Karl: God, what fag.
by Wesley Durrance September 19, 2005
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